Решение верное, проверьте валидатор
package en.javarush.task.jdk13.task04.task0429;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Positive and negative numbers
*/
public class Solution {
public static int sumNeg = 0;
public static int sumPos = 0;
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
sumOfPosAndNeg(Integer.parseInt(reader.readLine()));
sumOfPosAndNeg(Integer.parseInt(reader.readLine()));
sumOfPosAndNeg(Integer.parseInt(reader.readLine()));
System.out.println("Number of negative numbers: " + sumNeg);
System.out.println("Number of positive numbers: " + sumPos);
}
public static void sumOfPosAndNeg(int a){
if(a>0){
sumPos++;
}
else if (a<0){
sumNeg++;
}
}
}